Conveying and straightening apparatus



Oct. 30, 1934. P. B. ABRAMSEN 1,979,134

CONVEYING AND STRAIGHTENING APPARATUS Original Filed Sept. 10. 1931 5 Sheets-Sheet l INVENTOR Oct. 30, 1934. M N 1,979,134

CONVEYING AND STRAIGHTBNING APPARATUS Original Filed Sept. 10. 1931 3 Sheets-Sheet 2 'i ii I l INVENTOR Oct. 30, 1934. R a ABRAM EN 1,979,134

CONVEYING AND STRAIGHTENING APPARATUS Original Filed Sept. 10. 1931 3 Sheets-Sheet 5 Patented- Oct. 30,- 1934 CONVEYING AND STRAIGHTENIHNG' APPARATUS Petter B. Abramsen, Pittsburgh, Pa.-

Application September 10, 1931, Serial No. 562%,(i6ll Renewed April 3, 1934 5 Claims.

My invention relates generally to conveying and straightening apparatus and, more specifically, to apparatus which may be effectively used for either the conveying or conveying and straightening of tubes or rounds.

Heretofore, in the straightening of metal bars and tubing, it has been customary to revolve the bars on a spiral line between one or more sets of cross rolls. It has been found that in order to straighten such material effectively, it has been necessary to apply excessive opposite pressures on the material. This has been found to be very detrimental to the material, especially where the tubing or bars being straightened are of high ductility and correspondingly low tensile strength.

The ordinary cross rolling machines used for straightening are further objectionable, in that many different and complicated parts are required to construct a desirable and effective machine.

By my invention, I provide a machine which is effective for straightening tubes or rounds, and in which directly opposite pressures on the material being straightened are wholly eliminated. This is accomplished by the provision of a plurality of hollow rolls having inner surfaces which are adapted to engage the material being rolled. One side only of each of the hollow rolls engages the material being straightened and the rolls are so arranged that they will alternately engage the tube or round on opposite sides thereof and substantially throughout the whole periphery thereof. The inner material engaging surfaces of the rolls which I provide are preferably convex. The rolls are also preferably inclined to the axis of the material being straightened.

By my invention, I provide apparatus which may be effectively used for conveying tubes or rounds. When the apparatus is used for conveying, the tubes or rounds rest on the bottom side of each of the hollow rolls. The rolls may be driven eitherindividually or by a common drive and when so driven, carry the material forward through the rolls.

In the drawings, I have shown for purposes of illustration only, a preferred embodiment of my invention.

In the drawings,

Figure 1 is a plan view of a machine embodying my invention;

Figure 2 is a sectional view taken along the line II-II of Figure 1, the bar being treated being shown in elevation;

Figure 3 is an end elevation of the machine shown in Figure 1;

Figure 4 is a plan view similar to Figure 1, showing a machine wherein all of the rolls are driven; and i Figure 5 is a section taken along the line V-V of Figure 4, the bar being rolled being shown in elevation.

The rolls 2 which I provide are hollow cylinders or sleeves and have an inner surface 3 which is adapted to contact with a bar 4zas it passes through the machine. The inner surface 3 of the rolls is convex, instead of concave, as are the ordinary cross rolls. Each roll 2 is mounted on roller bearings 5 which are carried by the roll housing 6. The base 7 of each of the roll housings is mounted on a base plate 8 having slots 9 therein, which slots are adapted to cooperate with the projections 10 of the roll housing bases.

The roll housings 6 carrying the rolls 2 are so mounted that the rolls are inclined to the axis of the material being acted upon. When the apparatus is used for straightening, the rolls are so arranged that adjacent rolls contact on opposite sides of the bar or round being treated. The rolls are, therefore, located out of line with each other. so

In the embodiment of my invention shown in Figures 1 to 3, inclusive, provision is made for driving only one of the rolls. In the embodiment shown in Figures 4 and 5, provision is made for driving all of the rolls. Each roll to be driven is provided with an annular rack 11 which extends around the periphery thereof. Each annular rack is adapted to engage a worm gear 12 carried by a shaft 13 which is mounted in bearings 14 carried by the base plate 8. Each shaft 13 may be driven in any desired manner. In the embodiment shown in Figures 4 and 5, each shaft 13 is provided with a bevel gear 15 adapted to engage a bevel gear 16 carried by the main drive shaft 17. The main drive shaft 17 may be connected to a motor or any desirable driving means.

In order to make the apparatus which I provide applicable to the straightening of tubes or rounds of various sizes, it is desirable to provide adjusting means whereby at least one of the rolls may be adjusted laterally of the machine. In the embodiment shown in Figures 1 to 3, inclusive, I have shown means for adjusting each of the end rolls. As stated above, the base '7 of each roll housing is provided with a projection 10 adapted to cooperate with its slot 9 in the base plate 8. The roll housings are slidably mounted on the base plate. For adjusting the roll housings laterally of the machine, I provide screws 18 carto g ried by threaded bearings 19, the ends of which screws are adapted to engage the roll housings on either side thereof. Rotation of the screws in the proper direction will efiectuate a lateral adjustment of the roll housing.

As may be readily seen, the apparatus which I provide will effectively straighten tubes or rounds and will accomplish this result without requiring heavy pressures to be exerted on the material being straightened and without the necessity of heavy pressures being exerted on the material on directly-opposite sides thereof. .It may also be seen that the pressurewhichis ge'xerted on the material being rolled is exerted over a large area of the material, andiat anyiparticular. time is not confined to a small area,.as is the case Where ordinary cross rolls are-used.

As stated above, the apparatus which '1 pro--' vide is very effective for conveying tubes or rounds. When so used, the openings through the rolls are substantiallyin'linewith each ot-her so as-to permit the passage of astraight baror'tube therethrough. The rolls may be driven in any desired manner. They may 'be individually driven'or driven by-a c'ommon drive.

While Ihave shown and described a preferred embodiment and one modification of my invention, it is to be understood that Idonotintend to be limited 'thereb-yjbut' that the invention may be otherwise embodied Within the scope of the accompanyingclaims.

-- I claim:

-1."In a straightening machine, a plurality 'of 'hollow'rolls, each-having a convex inner material-engaging surface, said rolls being'sufilc'iently -'-inc'1i-n'ed to theaxisof the material 'being rolled to obtain line contact therewith and being arranged to exert pressure on opposite sides of the material, adjacent rolls being oppositely inclined, and means for driving at least one of the rolls.

2. In conveying or straightening apparatus, a plurality of hollow rolls, each having an inner convex surface adapted to engage the material being'rolled, each of said rolls being sufiiciently inclined to the axis of the material to obtain line contact therewith, and means for driving at least one of the rolls.

In conveying or straightening apparatus, .a.,plurality of hollow rolls, each having a contex innersurface adapted to engage the material being rolled, each of said rolls being sufiiciently inclined ito'the axis of the material to obtain line contact therewith, adjacent rolls being oppositely inclined, and means for driving at least one *ciently' inclined to the axis of the material being rolled 'to obtainline contact therewith and being arranged 'to exert pressure on opposite sides of the material, :adj-acent rolls being oppositely inclined, means for driving at least one of the the machine.

the rolls laterally of PETTER B. ABRAMSEN.

'rolls, and means for adjusting at least one of 

